If it has been processed properly, to usp grade, there really ought be no difference. The whole idea of usp is purity, and vg is a defined chemical.
If it's not usp grade I wouldn't touch it. Food grade is not the same, things can be fine to eat or drink but not to vape.
If it's not usp grade I wouldn't touch it. Food grade is not the same, things can be fine to eat or drink but not to vape.
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